Radiation projector



Aug. 15, 1925. 1,550,197

E. R. BERRY RADIATION PROJECTOR Filed June 6, 1923 Invent-o5 faward E Ber/Ty.

.Malden, in the county of Middlesex,

Patented Aug. 18, 1925.

UNITED- STATES EDWARD mummy,

PATENT oFrlcay O'F MALDEN, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A COBZOIPATION 01 NEW YORK.

RADIATION rnoancron.

Application filed June 6, 1923. Serial No; 643,785.

To. all whom it may concern:

Be it known that I, EDWARD R. BERRY, a citizen of the United States, residin at tate of Massachusetts, have invented certain new and useful Improvements in Radiation Pro: jectors, of which the following is a specification. v

The present invention comprises a method of conveying light and is embodied in an improved conductor 'or projector which utilizes-the light-conducting properties of quartz for conveying light through a curved path. l

Although my invention may have various useful applications, it is of particular utility in therapy when it is desired to subject areas to radiation which are not accessible to direct radiation from a lamp.

My invention utilizes the peculiar property of quartz of conducting light with very little loss through a curved or otherwise non rectilinear path. The preferred embodiment of my invention comprises a conductor for light comprising a plurality of quartz members abutting each otherand held in movable relation.

Fig. 1 illustrates a quartz conductor made closing sheath in part removed; Fig. 3 is an end elevation; Fig. 4 shows several quartz ,members of an applicator in separated rela- 5 comprises a plurality of quartzv members tion; and Fig. 5 shows the applicator in a bent position. v

The device shown in detail in Figs. 2 to 6, 7, 8, 9 and 10, fittedat their ends by ball and socket joints and surrounded by a sheath or retainer 11 consisting of a suitable flexible or yieldable material, for example, rubber.

' The end member 6 maybe pointed if desired,

or have any desired shape. The balland socket joints permit bending within limits to' arious desired configurations as shown in s The member-which receives the light, as member 10, may have a flat exposed end face to receive the light as shown in Fig. This figure shows the conductor in assembled relation to a suitable lamp 12 constituted for example, by a vapor arc lamp having a mercury cathode 13 an anode 14, and electric terminals 15, 16. Other desired lamps may be used. The heat from the lamp may be absorbed by a layer of water or other absorbing medium 17 which is confined by a suitable enclosure containing a window 18, conveniently consisting of quartz. Although particularly ultraviolet radiations are conducted b the combinationsshown in Fig. 1, I wishat to be understood that my invention is of eneral utility'for conveying radiations w hether visible or invisible.

When it is desired to project ultraviolet light, for example, into a wound or body cavity which is inaccessible to 'direct rays from a lamp, the applicator constituting my invention may be inserted in any convenient bent position to reach the arts to -be rayed for the therapeutic or o servational purposes, and the light will travel the length of the same, being carried around bends and finally emitted at the free end.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A radiation conducting device comprisin a plurality of members which are capa 1e of conductin light or other radiation and which are jointed end to end and a flexible'holder therefor.

2. A light or radiation conducting device comprising a plurality of members of quartz assembled end to end and being fitted to one another by ball and socket joints and means for holding said members in abutting relation.

3. A projector for light comprising a plurality of inembers of light-conducting material fitted to one another by ball and socket joints and arranged in movable relation, and a holder therefor.

4. A hoto. therapeutic device comprising a plura ty of jointed members consisting of silica and a sheath of yieldable material for EDWARD R. BERRY. 

